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1D50.57 - Balls on a Hoop

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1D50.57 - Balls on a Hoop

Title1D50.57 - Balls on a Hoop

Demonstrates centripetal forces​

Assembly Instructions

​Gather hand-driven rotator and balls on a hoop demo. Attach hoop to rotator. Squeezee clamp the hand-driven rotator to the table for stability.  Once pulled into the classroom, be sure to clamp down at least 2 wheels to stablize the cart for operation.

Setup Time5
Operation Time5
Preview Time5
Operation Instructions

​Spin the hoop by turning the hand-crank and observe the balls react to the centripetal force produced by the rotating object.

Demo on DimeNo
PIRA 200No
Export Instructions (if different)

​When spun fast enough the centripetal forces act strongly enough on the balls to counter act the force of gravity. ​This is because of the balls linear momentum traveling tangentially to the radius and angular velocity. The turning hoop will provide a max inward acceleration halfway up the hoop, thus there is a maximum height achieved no matter how fast the hoop rotates beyond this point.

Category1 Mechanics
Subcategory1D - Motion in Two Dimensions
Keywordscentripetal, force, angular, velocity
Construction Information
Balls on a Hoop
hand-driven rotator
bench clamp